Hi , For a project that I'm starting to raise, I need to speed up to a single phase motor. I still don't have the complete engine data, the only thing I know is that it is a single-phase geared motor with a condenser, it is tiny, it consumes very little and has to do little force, The simplest and most economical solution would be to change the sprockets of the chain that moves, but that would be a fixed speed and I wish it could be varied, My Doubt is ; a single-phase motor with a capacitor could be fitted with a frequency converter, and if so, what features should the drive have to have, Another option would be to change the chain sprockets so that it was faster and put a dimmer type voltage variator so that it could be lowered if needed, Summarizing, Given the little data I have of the engine, What do you advise me to speed up and be able to vary the, Greetings to all,

Hi. If you want you can vary the speed mechanically. There are pulleys that come with their distance between covers of varying form varying their diameter. As they open or close they lower or increase their speed. It is a way to vary the speed between certain parameters economically. You can use them with any engine while the axes coincide. There are models that come with a central nut to adjust or loosen. Regards https://www.amazon.es/Lovejoy-velocidad-variable-aluminio-inch-pounds/dp/B004SR6CLW http://suministrossercoin.com/productos/transmision-industrial/poleas-variadoras-piazzalunga-sercoin.php

You should know that increasing the speed of the engine will increase the power it consumes, so you should do tests to avoid burning it. You can look for a single-phase frequency converter of the motor power, such as the attached one.